java.lang.reflect.InvocationTargetException: at sun.reflect.GeneratedMethodAccessor1086.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.atlassian.confluence.extra.calendar3.DefaultEmbeddedSubCalendarsParser.getEmbeddedSubCalendarIds(DefaultEmbeddedSubCalendarsParser.java:79) at com.atlassian.confluence.extra.calendar3.extractor.EmbeddedSubCalendarsExtractor.addFields(EmbeddedSubCalendarsExtractor.java:27) at com.atlassian.confluence.plugin.descriptor.ExtractorModuleDescriptor$BackwardsCompatibleExtractor.addFields(ExtractorModuleDescriptor.java:36) at com.atlassian.bonnie.search.BaseDocumentBuilder.getDocument(BaseDocumentBuilder.java:104) at com.atlassian.confluence.search.lucene.ConfluenceDocumentBuilder.getDocument(ConfluenceDocumentBuilder.java:97) at com.atlassian.confluence.search.lucene.tasks.AddDocumentIndexTask.perform(AddDocumentIndexTask.java:43) at com.atlassian.bonnie.index.TempIndexWriter.perform(TempIndexWriter.java:73) at com.atlassian.confluence.search.lucene.TempIndexWriterStrategy.perform(TempIndexWriterStrategy.java:43) at com.atlassian.confluence.search.lucene.tasks.TempIndexBackedIndexTaskPerformer.perform(TempIndexBackedIndexTaskPerformer.java:21) at com.atlassian.confluence.search.lucene.reindex.ReindexWorkBatch.indexCollection(ReindexWorkBatch.java:128) at com.atlassian.confluence.search.lucene.reindex.ReindexWorkBatch$1.doInTransaction(ReindexWorkBatch.java:88) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128) at com.atlassian.confluence.search.lucene.reindex.ReindexWorkBatch.run(ReindexWorkBatch.java:58) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)